Most of our distros support DIB_DISTRIBUTION_MIRROR for setting the
mirror to be used when building. This has a major downside where if
someone would like to create a static configuration for building various
distro images it cannot set DIB_DISTRIBUTION_MIRROR (think of the case
where we want to run our tests).
By adding support for DIB_$DISTRO_DISTRIBUTION_MIRROR this problem is
resolved.
Change-Id: I92964b17ec3e47cf97e3a3091f054b2a205ac768
Other fedora/centos elements can use the YUM variable, already set in
some base elements (fedora, centos-minimal). This commit also exports it
for centos/centos7.
Set a fallback value in pip-and-virtualenv element.
Change-Id: I681d77b924be035c81043bb34c72ec5f859e7108
Closes-Bug: 1598087
The default value was set in the centos7 element, but not
exported, which caused issues in rpm-distro. Also changed
a test in rpm-distro to only check for DIB_RELEASE > 22
if it's fedora.
Closes-Bug: #1477172
Change-Id: Ib6f4227411c2e8f1965c3b78bc318512c59a7876
Initial support for a centos7 image.
This is separate to rhel7 because the major differences are things
like repo and image locations, which are always going to be different.
We should merge any real changes into the redhat-common layers.
Apart from the added support files in centos7/*, the other change is
mostly modifications to redhat-common's extract-image to handle
different partition layouts of the centos7 image.
Change-Id: I943abe5ff0a803f36eda266a79af0d9220edcae7
